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LTC3330_15 Datasheet, PDF (23/32 Pages) Linear Technology – Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Life Extender
LTC3330
APPLICATIONS
Inductor Selection
The buck is optimized to work with a 22µH inductor in
typical applications. A larger inductor will benefit high
voltage applications by increasing the on-time of the PMOS
switch and improving efficiency by reducing gate charge
loss. Choose an inductor with a DC current rating greater
than 350mA. The DCR of the inductor can have an impact
on efficiency as it is a source of loss. Tradeoffs between
price, size, and DCR should be evaluated.
The buck-boost is optimized to work with a minimum
inductor of 22μH for the 250mA IPEAK_BB setting. For the
other seven IPEAK_BB settings the inductor value should
increase as the IPEAK_BB selection decreases to maintain the
same IPEAK_BB • L product. The minimum inductor values for
the buck-boost for each IPEAK_BB setting are listed in Table 3.
Larger inductors may increase efficiency. Choose an
inductor with an ISAT rating at least 50% greater than the
selected IPEAK value. Table 7 lists several inductors that
work well with both the buck and the buck-boost.
Table 7. Recommended Inductors for the LTC3330
PART NUMBER
L(µH)
MANUFACTURER
744043102
LPS5030-105ML
LPS4018-105ML
LPS3314-105ML
B82442T1105K050
744043471
LPS4018-474ML
LPS3314-474ML
B82442T147K050
744042331
LPS4018-334ML
LPS3314-334ML
B82442T1334K050
744042221
LPS4018-224ML
LPS3314-224ML
B82442T1224K050
744031101
LPS4018-104ML
LPS3314-104ML
B82442T1104K050
744031470
LPS4018-473ML
LPS3314-473ML
B82442T1473K050
744031330
LPS4018-333ML
LPS3314-333ML
1070BS-330ML
B82442T1333K050
744031220
LPS5030-223ML
LPS4018-223ML
LPS3314-223ML
1070AS-220M
B82442T1223K050
744029220
1069BS-220M
1000
Würth Electronic
Coilcraft
Coilcraft
Coilcraft
EPCOS
470
Würth Electronic
Coilcraft
Coilcraft
EPCOS
330
Würth Electronic
Coilcraft
Coilcraft
EPCOS
220
Würth Electronic
Coilcraft
Coilcraft
EPCOS
100
Würth Electronic
Coilcraft
Coilcraft
EPCOS
47
Würth Electronic
Coilcraft
Coilcraft
EPCOS
33
Würth Electronic
Coilcraft
Coilcraft
Toko
EPCOS
22
Würth Electronic
Coilcraft
Coilcraft
Coilcraft
Toko
EPCOS
22
Würth Electronic
Toko
SIZE (mm) (L × W × H)
4.8 × 4.8 × 2.8
5.51 × 5.51 × 2.9
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
4.8 × 4.8 × 2.8
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
4.8 × 4.8 × 1.8
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
4.8 × 4.8 × 1.8
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
3.8 × 3.8 × 1.65
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
3.8 × 3.8 × 1.65
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
5.6 × 5 × 5
3.8 × 3.8 × 1.65
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
3.2 × 3.2 × 2
5.6 × 5 × 5
3.8 × 3.8 × 1.65
5.51 × 5.51 × 2.9
3.9 × 3.9 × 1.7
3.3 × 3.3 × 1.3
3.2 × 3.2 × 2
5.6 × 5 × 5
2.8 × 2.8 × 1.35
3.2 × 3.2 × 1.8
For more information www.linear.com/LTC3330
MAX IDC
(mA)
80
110
98
99
150
125
160
110
240
130
190
110
280
160
260
160
330
180
360
230
510
250
550
330
700
320
640
380
230
840
360
750
800
450
410
1040
300
290
MAX DCR
(Ω)
7
5.1
18
31
9.5
2.6
7.8
12
4.73
4.5
5.9
9.3
3.29
3.2
3.7
6
2.2
2.4
1.4
2.75
0.99
1
0.65
1.4
0.519
0.66
0.42
0.92
0.61
0.36
0.45
0.19
0.36
0.72
0.64
0.238
0.97
0.495
3330fb
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